CAS-004 Security Architecture Practice Question
A company uses Kubernetes for container orchestration. Which security control should be implemented to enforce that only specific images from a trusted registry can run in the cluster?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Admission controller (e.g., OPA/Gatekeeper)
Admission controllers can intercept requests to the Kubernetes API server and enforce policies, such as allowing only images from a specific registry.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Pod security admission (PSA)
Why it's wrong here
PSA enforces pod security standards, not image registry.
- ✓
Admission controller (e.g., OPA/Gatekeeper)
Why this is correct
Correct – admission controllers can validate image registry.
- ✗
Network policies
Why it's wrong here
Network policies control traffic, not image source.
- ✗
RBAC roles
Why it's wrong here
RBAC controls user permissions, not image source.
Go deeper
Related to this question
About these practice questions
One of 968 original CAS-005 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CAS-005 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CAS-005 exam.